The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 45
... Venus at any time one pleased . The moment of departure would have to be calculated so that , when the spaceship reached the planet's orbit , the planet was there too ! In the case of the Venus journey , which would last 145 days , Venus ...
... Venus at any time one pleased . The moment of departure would have to be calculated so that , when the spaceship reached the planet's orbit , the planet was there too ! In the case of the Venus journey , which would last 145 days , Venus ...
Pagina 81
... Venus and the Sun - and since the line Sun - Venus is also known , simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation ...
... Venus and the Sun - and since the line Sun - Venus is also known , simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation ...
Pagina 121
... Venus in this respect . It is quicker to reach Venus , but takes rather more power - at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalising one . As at her closest she is only ...
... Venus in this respect . It is quicker to reach Venus , but takes rather more power - at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalising one . As at her closest she is only ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole